If f(x) = - x + 1 then (x) = input - x + 1 = output Here x just signifies the input it can be any letter or number

f(x) = - x + 1 f(q) = - q + 1 f(A) = - A + 1

If our input x = 4 then we have

f(4) = - 4 + 1 = 13

A function can also be expressed using y or f:x-> f(x) = - x + 1 y = - x + 1 f:x-> - x + 1 The 3 expressions above mean the exact same thing There are 3 types of basic graphs Linear - This graph is a straight line Exponential - This type of graph grows and shrinks very quickly Quadratic- This graph is a parabola which means it makes a u or n shape